package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品和口味统一使用这个
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;
    @PostMapping()
    public R<String> save(@RequestBody DishDto dishDto){
        dishService.saveWithFlavor(dishDto);
        String key = "dish_" + dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);
        return R.success("新增成功");
    }


    @GetMapping("/page")
    public R<Page> page(Integer page,Integer pageSize,String name){
        // 1 构造分页对象 2 构造排序及查询条件 3 执行分页条件查询 4 遍历分页查询列表数据 根据id查询分类数据 从而获取该菜品分类信息 5 封装数据返回
        // 构造分页器
        Page<Dish> pageInfo = new Page<>();
        Page<DishDto> dishDtoPage = new Page<>();
        // 条件构造器
        LambdaQueryWrapper<Dish> lam = new LambdaQueryWrapper<>();
        // 添加过滤条件
        lam.like(name!=null,Dish::getName,name);
        // 添加排序条件
        lam.orderByDesc(Dish::getUpdateTime);
        // 执行条件查询
        dishService.page(pageInfo,lam);
        // 对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");

        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item)->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();
            // 根据categoryId 查询分类对象
            Category category = categoryService.getById(categoryId);
            if (category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);

    }


    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }


    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){

        log.info(dishDto.toString());
        dishService.updateDishWithFlavor(dishDto);
        Set keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);
        return R.success("编辑菜品信息成功");
    }

    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){



        List<DishDto> dishDtoList = null;
        //动态构造key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();//dish_1397844391040167938_1
//先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        if(dishDtoList != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }


        LambdaQueryWrapper<Dish> lam=new LambdaQueryWrapper<>();
        lam.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        lam.eq(Dish::getStatus,1);
        lam.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(lam);




        dishDtoList = list.stream().map((item)->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);
            if(category!=null){
                dishDto.setCategoryName(category.getName());
            }
            LambdaQueryWrapper<DishFlavor> lam2 = new LambdaQueryWrapper<>();
            Long dishId = item.getId();
            lam2.eq(DishFlavor::getDishId,dishId);
            List<DishFlavor> dishFlavors = dishFlavorService.list(lam2);
            dishDto.setFlavors(dishFlavors);
            return dishDto;
        }).collect(Collectors.toList());

        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }


}
